排序方式: 共有45条查询结果,搜索用时 31 毫秒
1.
An ultrabroadband (up to 35 nm FWHM) generation by a pulsed dye laser is reported. The principle of laser operation is based on a recently proposed cavity configuration, which we have termed spatially-dispersive resonator. By means of a prism pair this spreads the various spectral components into different spatial areas in the active medium and thus reduces the competition between them. A generation of a spectrum containing a number of equally spaced lines is also demonstrated. 相似文献
2.
3.
P. A. Apanasevich A. A. Kananovich A. A. Demidovich M. B. Danailov V. A. Orlovich 《Journal of Applied Spectroscopy》2011,78(1):43-49
Output power dependences of composite Nd3+:YVO4 Raman laser stationary generation on the longitudinal diode pump power are measured at different transmissions of the output
mirror at the Stokes radiation frequency. The deviation of the measured dependences from linear is explained by the influence
of thermal effects on both the overlap of the beams and diffraction losses. A method to estimate the laser and Stokes losses
in the cavity and the parameters characterizing the overlap of the laser radiation with the pump and Stokes beams is proposed.
A Stokes-component of power 2.1 W is obtained and corresponds to 12% diode-to-Stokes efficiency. 相似文献
4.
K. Koitschev G. Danailov G. Kassabov 《Monatshefte für Chemie / Chemical Monthly》1967,98(6):2321-2325
Zusammenfassung Der vorgeschlagene Mechanismus wird in entsprechender analytischer Form dargestellt. Die Versuchsergebnisse stimmen mit den theoretischen Berechnungen überein.
A suitable mathemathical form has been given to the proposed mechanism. The experimental results are in good agreement with the theoretical ones.相似文献
5.
Danailov DM Viehland LA Johnsen R Wright TG Lee EP 《The Journal of chemical physics》2007,127(8):084303
The results of both experimental and theoretical studies of the mobility of O(+) in Ne are reported. Errors in the experiments have been carefully assessed, allowing the obtained data to serve as stringent tests of the ab initio potentials. These potentials were calculated using the RCCSD(T) method, employing basis sets of quintuple-zeta quality. Curves were calculated for the lowest (4)Sigma(-) state [arising from O(+)((4)S) interacting with Ne] and for the (2)Pi state [arising from O(+)((2)D) interacting with Ne]. Then, the effects of spin-orbit coupling were incorporated by using the Breit-Pauli operator. The resulting ground state (Omega=32) of NeO(+) gives mobility values in good agreement with experiment at all field strengths. Values of spectroscopic quantities for the ground electronic state of NeO(+) are also presented. 相似文献
6.
In this study,the three dimensional nanoscale organization in the photoactive layers of poly(3-hexylthiophene) (P3HT) and a methanofullerene derivative (PCBM) is revealed by transmission electron tomography.After annealing treatment,either at elevated temperature or during slow solvent evaporation,nanoscale interpenetrating networks are formed with high crystalline order and favorable concentration gradients of both components through the thickness of the photoactive layer.Such a tailored morphology acco... 相似文献
7.
P. V. Shpak S. V. Voitikov A. A. Demidovich M. B. Danailov V. A. Orlovich 《Applied physics. B, Lasers and optics》2012,108(2):269-281
Experimental and theoretical studies of the coupled-cavity diode-pumped Nd:YAG/Cr:YAG microchip lasers with intracavity Raman conversion of laser pulses in a Ba(NO3)2 crystal into two Stokes pulses have been made. Two lasers with a different cavity length have been investigated. The minimal pulse durations at the 2nd Stokes wavelength were ??100 ps in the short-cavity laser at pulse energy of 5???J, and the pulse repetition rate reached 20?C24?kHz. The laser and Stokes pulse dynamics, as well as the spatial intensity distribution of the laser and the 1st Stokes beams at the output mirror have been recorded. A model describing such coupled-cavity microchip Raman lasers has been developed. The numerically simulated laser and Stokes pulse dynamics, and the calculated pulse energy, duration, and repetition rate are in good agreement with the experimental data. 相似文献
8.
A.A. Lutich M.B. Danailov S. Volchek V.A. Yakovtseva V.A. Sokol S.V. Gaponenko 《Applied physics. B, Lasers and optics》2006,84(1-2):327-331
We report on experimental and theoretical investigations of the birefringence of free-standing nanoporous anodic alumina membranes
in the optical range. The value of birefringence is analyzed for the samples with different porosities by measuring polarization
dependent transmission spectra at different angles of incidence. The experimental data are compared to the results of birefringence
simulations in accordance with the modified Bruggeman effective-medium approximation. It is both experimentally and theoretically
shown that the birefringence value increases with porosity increases in the low porosity region. The porous alumina samples
under investigation possess the greatest value of birefringence (0.062) up to the present.
PACS 78.20.-e; 78.67-m; 78.20.Fm; 78.20.Ci 相似文献
9.
10.
Márcio AF Belo-Filho Franklina MB Toledo Bernardo Almada-Lobo 《The Journal of the Operational Research Society》2014,65(11):1735-1747
Setup operations are significant in some production environments. It is mandatory that their production plans consider some features, as setup state conservation across periods through setup carryover and crossover. The modelling of setup crossover allows more flexible decisions and is essential for problems with long setup times. This paper proposes two models for the capacitated lot-sizing problem with backlogging and setup carryover and crossover. The first is in line with other models from the literature, whereas the second considers a disaggregated setup variable, which tracks the starting and completion times of the setup operation. This innovative approach permits a more compact formulation. Computational results show that the proposed models have outperformed other state-of-the-art formulation. 相似文献